Automatic fire-alarm



(No Model.)

A. MEISENHEIMER.

AUTOMATIC FIRE ALARM. No. 850 381. Patented Oct. 5, 1886.

I M lllllllilillm WI TJVESSES UNITED STATES PATENT GFFICEO ADAM MEISENHEIMER, OF MILXVAUKEE, \TISCOESIN.

AUTOMATIC FIRE-ALARM.

SPECIFICATION forming part of Letters Patent No. 350,381, dated October 5, 1886.

A pplicaiion filed May 8, 1886.

To all whom it may concern.-

Be it known that I, ADAM MEisENiIEmER, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee and State of W'isconsin, have invented certain new and useful Improvements in Automatic Fire- Alarms; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the acconr panying drawings, which form a part of this specification, and in which Figure l is a perspective view of my improved automatic fire-alarm. Fig. 2 is a similar view with the perforated cover removed, and Fig. 3 is a detail view of the fusible link detached.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to that class of automatic firc-alarms in which the fusion of metal at a certain degree of heat will release the alarm; and it consists in the improved con struction and combination of parts of a device in which a spring having connection at one end with the wire of a circuit, is held at its free end by a fusiblelink,Which on fusing will release the free end and bring it into contact with a post having the other wire of the circuit connected to it, as hereinafter more fully described and claimed. 7

In the accompanying drawings, the letter A indicates a block or base of wood or similar material having two binding posts or screws, 13 13,110 which are secured insulated wires 0 O, passing through suitable perforations through the block, and to which posts or screws the wires D D of a circuit may be attached. The end of one of the insulated wires is connected to a post, E, formed by a strip of metal bent to form a doubled lip, F, and two diverging lips, G G, by which it is secured to the outer face of the block. A flat spring, H, is held clamped in the doubled lip at one end, having, preferably,a rivet, I, through it and the denbled portions of the lip for the purpose of se curing it perfectly, and this spring is provided with a facing, J, of platinum, near the outer free end. A post, K, consistin of a strip of metal having a lip, L, secured to the face of Serial No. 201,626. X0 model.

the block, and having an outwardly-projecting portion, M, is secured in contact with the other insulated wire, and the edge l of the outwardlyproiecting portion of the post is serrated, and may come in contact with the platinum facing of the spring when the spring is released. A link, 0, is formed with a doubled portion forming an eye, P, which fits freelyupon a stud, Q, projecting from the face oi the block and the end of a Hat eye, R, is secured between the shanks of the doubled portion by means of a mass of solder, S,whieh is fusible at the degree of heat at which it is desired to give the alarm, the said shank, T, projecting from the middle of the ilat eye, being twisted. The [lat eye R iits upon the outer end of the spring, the upper edge of which is cut away to form a notch, U, extending to the outer end, the shoulder thus formed preventing the eye from slipping too far in upon the spring. It will be seen that this link will hold the free end of the spring away from contact with the serrated edge of the post, and when the temperature in the room or building in which the apparatus is securedthe apparatus being preferably secured at the ceiling or roof of the room or buildingrises to the temperature at which the solder fuses, the link will separate, and the spring will by its elasticity spring toward the serrated post, forming a contact and closing the circuit in the wires, giving the alarm.

The device is preferably protected by a cap or cover, V, having its top perforated for the easier passage of the heated air, the cover protecting the spring and the link from being dis engaged by any cause excepting by heat.

The solder may be composed of any easilyfused metal or composition which will fuse at a certain temperature at which it is desired to sound the alarm, and which is sufficiently strong to hold the spring back until fused.

Having thus described myinvention, Iclaim. and desire to secure by Letters Patent of the United States- 1. In an automatic fire-alarm, the combina tion of a post formed of a strip of metal bent to form adoubled lip and two diverging lips, and having the diverging lips secured to the face of the block, and having contact with one wire of a circuit, a post connected to the other wire of the circuit and having a serrated edge,

a spring, the upper edge of which is cut away to form a notch,securcd in one post and having a platinum facing near its outer end for coming in contact with the serrated edge of the post, and afusible link having one'eye upon the free end of the spring and one eye upon a stud, and holding the free end of the spring away from the serrated post, as and for the purpose shown and set forth.

2. In an automatic fire-alarm, the combination of a block having binding posts or screws, and having two insulated wires passing from the posts or screws through the block, two posts connected with said wires, a spring secured at one end to one of said posts and having a platinum facing near its outer end, and a shoul' der formed upon the upper edge near the free ADAM MEISENHEIMER,

\Vitnesses:

HENRY C, ROETHLISBERGER, Enw. J. WAGNER, ALBERT AREAS. 

